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  1.  
  2.  
  3.           system command
  4.                Executes command via the system(3) call.  Differs  from
  5.                exec   in  that  system  doesn't  return  the  executed
  6.                command's standard output as  the  result  string,  and
  7.                system  goes through the Unix shell to provide wildcard
  8.                expansion, redirection, etc, as is normal  from  an  sh
  9.                command   line.   The  exit  code  of  the  command  is
  10.                returned.
  11.